Reactions and statics help

i attached a picture of what it looks like. im supposed to find the reactions at c & d, and the reactions at a & c. i think its supposed to be done using a 2 force system. i have no clue how to even start this.

Is this piece attached to anything? Leaning against a wall? On wheels? The reaction is going to be determined by those things. In general, a reaction will have both a vertical and horizontal component. From there, you resolve all forces into components and use Newton's second law.